Collapsible expansion gasket



L. FRIEDMAN AND D. WALLACE. coLLAPslBLE EXPANSION GASKET. APPLCATIONFILED MAR. 29, 1922.

Patented Aug. 29

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WIT/VESSES vitTCi'lEiS FRIEDMAN, 0F li/EUN'CIE,` ENDIANA, ANI) DAVIDWALLACE, OF TULSA, OKLAHOMA.

COLLAZESIBLE EXPANSION GASKET.

Specification of Letters Patent.

Patented Aug, 29, 1922..

@riginal application led March 27, 1922, Serial No'. 546,948. Dividedand this application iled March 39, 1922. Serial No. 547,87.

To all whom it may concern.'

Be it known that we, LoUns FRIEDMAN and DAVID WALLACE, citizens of theUnited States, and residents, respectively, of Muncie, in the county ofDelaware and State of Indiana, and Tulsa, in the county ot Tulsa andState of Oklahoma, have invented certain new and useful improvements inCollapsible Expansion Gaskets, of which the following is aspeciiication.

Our present invention relates generally to appliances for oil, gas orwater wells and more particularly to a collapsible expansion gasket foruse with flowing devices and capable as well of utilization for thevarious purposes for which gaskets or packers are at present employed,our object being the provision of a simple effective construction byvirtue of which the gasket or packer is permitted to readily collapse onwithdrawal from a well so as to eliminate trouble eX- perienced inpulling or withdrawing the well packers now used and our presentapplication being a division of our application Serial No. 546,948 whichwas filed March 27,1922. y

'In the accompanying drawingv which illustrates our present inventionand forms a part of this specification,

Figure 1 is a cross section through ourv improved collapsible expansiongasket illus- .trating the practical application of the same within awell casing,

Figure 2 is a detail perspective view of our improved gasket removed,andv Figure 3 is a top plan view thereof.

Referring now to these figures and particularly to Figure 1 we haveshown our improved collapsible expansion gasket in one of its many usesas for instance to confine the natural gas in a well, or the gas or airforcibly introduced into the well, in order to force such natural gas orintroduced gas or air to seep or fion/,through apertures intended forthat purpose. Thus we have shown our improved collapsible expansiongasket 10, between washers 11 and 12 around a portion of an outflow linegenerally indi-- cated at 13 and upon the upper end of a Huid and gasreceiver 14 and in close uniform contact around its peripheral face withthe internal surface of a well casing 15.

.F or the above purposes our improved collapsible expansion gasket ismade in cylindrical form from a substantially soft rubber and hasnotches or recesses 16 therein which while permitting ready expansion,at the same time provides ytor easy and quick collapse when withdrawingthe gasket in order to eliminate the usual trouble incident to pullingor withdrawing the ordinary oil well packer.

In the present instance, we have shown the gasket recessed by thecutting ot an annular series of notches 16, the notches being upon itsouter surface and extending partly into its peripheral face and partlyinto its lower side face, although the particular direction, number andextent of the recesses may of course'be varied so long as their number,extent and direction permit of ready expansion and at the same timeallow them to readily collapse sufiicient to promote easy introductioninto and removal from a well casing.

We claim:

1. A collapsible expansion gasket for disposition within, and readyremoval from, well casings, consisting of an annular body formed of softrubber, having recesses in its outer contact surface adapting it toreadily .yield when inl closely interitting relation within a wellcasing.

2. A collapsible expansion gasket for dis` position within, and readyremoval from, 'well casings, consisting of an annular body formed ofrelatively soft rubber, having recesses extending partially through itsperipheral face and one side face, arranged in a series therearound topermit the same to readily yield when in closely intertitting relationwithin a well casing.

LOUES FRIEDMAN.

DAVID WALLACE.

